77442093 has 12 divisors (see below), whose sum is σ = 115718460. Its totient is φ = 49847616.

The previous prime is 77442083. The next prime is 77442107. The reversal of 77442093 is 39024477.

It can be written as a sum of positive squares in 2 ways, for example, as 52969284 + 24472809 = 7278^2 + 4947^2 .

It is not a de Polignac number, because 77442093 - 2⁴ = 77442077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77442083) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 148096 + ... + 148617.

It is an arithmetic number, because the mean of its divisors is an integer number (9643205).

Almost surely, 2^77442093 is an apocalyptic number.

It is an amenable number.

77442093 is a deficient number, since it is larger than the sum of its proper divisors (38276367).

77442093 is a wasteful number, since it uses less digits than its factorization.

77442093 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 296748 (or 296745 counting only the distinct ones).

The product of its (nonzero) digits is 42336, while the sum is 36.

The square root of 77442093 is about 8800.1189196510. The cubic root of 77442093 is about 426.2447347297.

The spelling of 77442093 in words is "seventy-seven million, four hundred forty-two thousand, ninety-three".